1. Ubuninzi obuphantsi kunye nokuzaliswa okuphezulu
Irabha ye-ethylene-propylene yirubha enobunzima obuphantsi, kunye nobuninzi be-0.87.Ukongezelela, inokuzaliswa ngexabiso elikhulu leoli kunye ne-EPDM.
Ukongeza izihluzi kunokunciphisa iindleko zeemveliso zerabha kwaye zenze ixabiso eliphezulu le-ethylene propylene irabha yerabha eluhlaza.Kwirubha ye-ethylene propylene enexabiso eliphezulu le-Mooney, amandla omzimba kunye nomatshini wokuzaliswa okuphezulu awancitshiswa kakhulu.
2. Ukuchasa ukuguga
Irabha ye-ethylene-propylene inokumelana nemozulu entle kakhulu, ukuxhathisa kwe-ozone, ukumelana nobushushu, ukuxhathisa kwe-asidi kunye ne-alkali, ukuxhathisa komphunga wamanzi, ukuzinza kombala, iipropati zombane, iipropati zokuzalisa i-oyile kunye ne-fluidity kwindawo yokushisa.Iimveliso zerabha ze-ethylene-propylene zingasetyenziselwa ixesha elide kwi-120 ° C, kwaye zingasetyenziswa ngokufutshane okanye ngokuphindaphindiweyo kwi-150-200 ° C.Ukongeza i-antioxidants efanelekileyo kunokunyusa ubushushu bokusebenzisa kwayo.Irabha ye-EPDM idityaniswe neperoxide ingasetyenziswa phantsi kweemeko ezinzima.I-rubber ye-EPDM inokufikelela ngaphezu kwe-150h ngaphandle kokuqhekeka phantsi kweemeko ze-ozone concentration ye-50phm kunye ne-30% yokwelula.
3. Ukumelana nokubola
Ngenxa yokuba irabha ye-ethylene propylene ayinayo i-polarity kunye neqondo eliphantsi lokungahlambuluki, inokumelana kakuhle neekhemikhali ezahlukeneyo zepolar ezifana ne-alcohols, i-acids, i-alkalis, i-oxidants, i-refrigerants, i-detergents, i-oyile yezilwanyana kunye nemifuno, i-ketones kunye negrisi.Kodwa inozinzo olulambathayo kumafutha kunye nezinyibilikisi ezinevumba elimnandi (ezifana nepetroli, ibenzene, njalo njalo.) kunye neoyile yeminerali.Ukusebenza kuya kuncipha phantsi kwesenzo sexesha elide le-asidi egxininisiweyo.Kwi-ISO/TO 7620, phantse iindidi ezingama-400 zeekhemikhali ezonakalisayo zerhasi kunye nolwelo ziqokelele ulwazi kwiipropathi ezahlukeneyo zerabha, kwaye zikhankanye amanqanaba e-1-4 ukubonisa inqanaba lesenzo, kunye nefuthe leekhemikhali ezonakalisayo kwiipropathi zerabha.
Ireyithi yeBanga lokuDumba koMqulu/% Ixabiso lokunciphisa ubulukhuni Impembelelo ekusebenzeni
1 <10 <10 encinci okanye hayi
2 10-20 <20 encinci
3 30-60 <30 eliphakathi
4 >60 >30 ezinzima
4. Ukumelana nomphunga wamanzi
Irabha ye-ethylene-propylene inokumelana nomphunga obalaseleyo wamanzi kwaye iqikelelwa ukuba ingcono kunokumelana nobushushu bayo.Kwi-230 ℃ umphunga oshushu kakhulu, ukubonakala kwe-EPDM kwahlala kungatshintshi emva kwe-100h.Nangona kunjalo, phantsi kweemeko ezifanayo, irabha ye-fluorine, irabha ye-silicone, irabha ye-fluorosilicone, irabha ye-butyl, irabha ye-nitrile, kunye nerabha yendalo ziye zafumana ukuwohloka okukhulu kwimbonakalo emva kwexesha elifutshane.
5. Ukumelana namanzi ashushu
Irabha ye-ethylene-propylene nayo inokumelana bhetele namanzi ashushu kakhulu, kodwa inxulumene ngokusondeleyo kuzo zonke iinkqubo ze-vulcanization.I-rubber ye-ethylene-propylene kunye ne-dimorpholine disulfide kunye ne-TMTD njengenkqubo ye-vulcanization, emva kokucwiliswa kwamanzi ashushu kakhulu kwi-125 ° C kwiinyanga ze-15, iimpawu zomatshini zitshintsha kakhulu, kwaye izinga lokwandiswa kwevolumu li-0.3 kuphela.
6. Ukusebenza kombane
Irabha ye-ethylene-propylene ineempawu ezibalaseleyo zokugquma umbane kunye nokuxhathisa kwe-corona, kwaye iimpawu zayo zombane zingcono okanye zisondele kwirabha ye-styrene-butadiene, i-chlorosulfonated polyethylene, i-polyethylene kunye ne-polyethylene edibeneyo.
7. Ukuba bhetyebhetye
Ngenxa yokuba akukho zixhobo ze-polar kwisakhiwo se-molecular ye-rubber ye-ethylene-propylene, amandla adibeneyo e-molecule aphantsi, kwaye i-molecular chain chain ingakwazi ukugcina ukuguquguquka kuluhlu olubanzi, okwesibini kuphela kwi-rubber enokuxoxisana kunye ne-butadiene, kwaye isenakho igcinwe kumaqondo aphantsi.
8. Ukuncamathela
Irabha ye-ethylene-propylene ayinalo amaqela asebenzayo ngenxa yesakhiwo sayo se-molecular kwaye inamandla aphantsi adibeneyo.Ukongeza, irabha kulula ukuqhakaza, kwaye ukuzincamathela kwayo kunye nokuncamathelana kubi kakhulu.
Ixesha lokuposa: Nov-17-2021